Cu25 William Comyn

Cu25 William Comyn, Earl of Buchan was the son of Richard Comyn (Cu26), Lord of Tynedale and Hextilda (?).
Born:  before 1177. 
Married:  firstly, unknown wife (?). 
 secondly, Margaret, Countess of Buchan, daughter of Fergus, 4th Earl of Buchan, before 1210..
Died in 1233.
 Children of William Comyn, Earl of Buchan and unknown wife (?)
(Cu24-1) Richard Comyn+ 1 
(Cu24-2) Walter Comyn, Earl of Menteith 
(Cu24-3) Sir John Comyn of Badenoch+  
Children of William Comyn, Earl of Buchan and (Cu24-4) Margaret, Countess of Buchan
(Cu24-5) Elizabeth Comyn d. c 1267 
(Cu24) Alexander Comyn, 6th Earl of Buchan+ b. b 1233, d. b 6 Apr 1290
William Comyn, Earl of Buchan held the office of Justiciar [Scotland].1 He founded the Abbey of Deer in Buchan.1 He gained the title of Earl of Buchan, in right of his wife. 

[S6] G.E. Cokayne; with Vicary Gibbs, H.A. Doubleday, Geoffrey H. White, Duncan Warrand and Lord Howard de Walden, editors, The Complete Peerage of England, Scotland, Ireland, Great Britain and the United Kingdom, Extant, Extinct or Dormant, new ed., 13 volumes in 14 (1910-1959; reprint in 6 volumes, Gloucester, U.K.: Alan Sutton Publishing, 2000), volume II, page 374. Hereinafter cited as The Complete Peerage.